anything that is a noun. Can be used as a very offensive insult or a compliment. Can also be used to describe something that is really cool. Or it can just be used to describe anything period. Can also be used as an adjective. Actually, nuber can be used however you feel like it.
The act of inserting 2 fingers into the vaginal opening, 1 into the anus and tickeling the clit with the thumb. Usually performed when the girl is on her back. For visual, Please refer to the shocker.
Damon: "Hey did you give her the shocker?"
Eric: "Naw bro, I gave her the numb'er."